STUDY GUIDE: Chemical Bonds, Reactions, Equations

Front

What charge will an atom have if it gains two electrons?

Back

-2

Front

What is the chemical reaction called when a substance combines with oxygen and releases energy?

Back

Combustion

Front

Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe

Back

No

Front

What is a valence electron?

Back

The number of electrons in the last shell.

Front

What does the term 'molecule' refer to?

Back

A group of atoms bonded together.

Front

What is the definition of a chemical bond?

Back

A lasting attraction between atoms that enables the formation of chemical compounds.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.

Front

What is a reactant in a chemical reaction?

Back

A substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical reaction?

Back

A substance that is formed as a result of a chemical reaction.

Front

What does the law of conservation of mass state?

Back

Mass is neither created nor destroyed in a chemical reaction.